---
title: MailItem.OutlookInternalVersion Property (Outlook)
keywords: vbaol11.chm1312
f1_keywords:
- vbaol11.chm1312
ms.prod: outlook
api_name:
- Outlook.MailItem.OutlookInternalVersion
ms.assetid: c9328c0e-33d8-4c01-b745-8eb5820a48f5
ms.date: 06/08/2017
---


# MailItem.OutlookInternalVersion Property (Outlook)

Returns a  **Long** representing the build number of the Outlook application for an Outlook item. Read-only.


## Syntax

 _expression_ . **OutlookInternalVersion**

 _expression_ A variable that represents a **MailItem** object.


## See also


#### Concepts


[MailItem Object](mailitem-object-outlook.md)

